Sha256: 47ecfd150d1f62cf13f90052f8e3209b04c74902bc4b4e0ea921344fef51b36a
Contents?: true
Size: 1.74 KB
Versions: 12
Compression:
Stored size: 1.74 KB
Contents
var anObject = require('../internals/an-object');
var defineProperties = require('../internals/object-define-properties');
var enumBugKeys = require('../internals/enum-bug-keys');
var hiddenKeys = require('../internals/hidden-keys');
var html = require('../internals/html');
var documentCreateElement = require('../internals/document-create-element');
var sharedKey = require('../internals/shared-key');
var IE_PROTO = sharedKey('IE_PROTO');
var PROTOTYPE = 'prototype';
var Empty = function () { /* empty */ };
// Create object with fake `null` prototype: use iframe Object with cleared prototype
var createDict = function () {
// Thrash, waste and sodomy: IE GC bug
var iframe = documentCreateElement('iframe');
var length = enumBugKeys.length;
var lt = '<';
var script = 'script';
var gt = '>';
var js = 'java' + script + ':';
var iframeDocument;
iframe.style.display = 'none';
html.appendChild(iframe);
iframe.src = String(js);
iframeDocument = iframe.contentWindow.document;
iframeDocument.open();
iframeDocument.write(lt + script + gt + 'document.F=Object' + lt + '/' + script + gt);
iframeDocument.close();
createDict = iframeDocument.F;
while (length--) delete createDict[PROTOTYPE][enumBugKeys[length]];
return createDict();
};
// `Object.create` method
// https://tc39.github.io/ecma262/#sec-object.create
module.exports = Object.create || function create(O, Properties) {
var result;
if (O !== null) {
Empty[PROTOTYPE] = anObject(O);
result = new Empty();
Empty[PROTOTYPE] = null;
// add "__proto__" for Object.getPrototypeOf polyfill
result[IE_PROTO] = O;
} else result = createDict();
return Properties === undefined ? result : defineProperties(result, Properties);
};
hiddenKeys[IE_PROTO] = true;
Version data entries
12 entries across 12 versions & 4 rubygems